8/14/2019 Adelaide Hills Crop Watch 111209

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CropWatch SA Adelaide Hills is a service provided by the Adelaide Hills Wine Region Inc. DJs Grower Services provide vineyard monitoring data, interpret weather data &compile the messages. Information is general in nature and should not be relied upon. Always seek professional advice specific to your vineyard. All photos (c) JamesHook & Richard McGeachy unless noted. CropWatch acknowledges the support of James Hook & Matthew Wilson in preparing this message.

CCCCCCCCCCCCrrrrrrrrrrrrooooooooooooppppppppppppWWWWWWWWWWWWaaaaaaaaaaaattttttttttttcccccccccccchhhhhhhhhhhhBB RRRRIIEESSPPEEAASIIZZEEEELL 3311The early season varieties Chardonnay and Pinot Noirare getting close to Berries Peasize (EL 31). This is

earlier than usual and growers are advised to prepare foran early harvest especially if they are producing grapesfor sparkling wine. Note the with-holding periods of anyvineyard agrochemicals you are using to ensure you donot use any products too close to harvest.

Downy Mildew

This week we have confirmed a low level of DownyMildew in vineyards from the Downy Mildew 10:10:24Primary Event on the 28th of November. These Oilspotshave produced spores on the backs of leaves (left)

caused by the Downy Secondary Event (warm, wetnight) on December 8th.

Event Date

10:10:24 (Primary Event). 28th of November

Oilspots visible. 7th of December

Warm, wet night(Secondary Event).

8th of December

Fresh Oilspots expected onuntreated / unprotected vines.

16th of December

The risk of Downy Mildew affecting your bunches is low.Most vineyards have berries larger than 3-5mm and areconsidered immune to infection. Downy Mildew can onlyaffect your harvest if more secondary events occur andOilspot levels build up. CropWatch recommendsincluding Downy Mildew protectants with any fungicidespray especially if rain is forecast.

Remember once Oilspots appear they cannot besuccessfully killed by metalaxyl (Ridomil, Axiom).

Walk down your vine rows and look for any signs like thephotos shown on the CropWatch Blog. Tag any Oilspotsyou find and watch to see if they sporulate and spread,or if they dry out and become inactive.

Early season continues.

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8/14/2019 Adelaide Hills Crop Watch 111209

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CropWatch SA Adelaide Hills is a service provided by the Adelaide Hills Wine Region Inc. DJs Grower Services provide vineyard monitoring data, interpret weather data &compile the messages. Information is general in nature and should not be relied upon. Always seek professional advice specific to your vineyard. All photos (c) JamesHook & Richard McGeachy unless noted. CropWatch acknowledges the support of James Hook & Matthew Wilson in preparing this message.

Light Brown Apple Moth

Check your developing bunches for signs of caterpillar damage. Apple moth damage is usually found inhotspots. If you find one damaged bunch like this (above) check other bunches and in nearby leaves formore apple moth activity.

Withholding Periods

GRAPEVINE PRODUCTS THAT CANNOT BE USED AFTER BERRIES PEASIZE (EL 31).

Name Withholding Period Disease

Proclaim, Avatar Peasize - EL 31, no later than 56days before harvest. LBAM

Success2, Entrust Peasize - EL 31. LBAM

Flint 500 WG,Cabrio

Peasize - EL 31 Powdery & Downy Mildew

Switch Peasize - EL 31 (before bunchclosure) but no later than 60 daysbefore harvest.

Botrytis

Topas 100EC EL 31, no later than 60 days

before harvest.

Powdery Mildew

Legend EL 31, no later than 42 daysbefore harvest.

Powdery Mildew